Coil-forming apparatus.



M.- SAJWPHIBLD.` COIL FORMING APPARATUS. APPLIGATON FILED Imc. 211910.

D Asians-SHEET 1. i

y Ptennea. Sept. 10

SANDFIELD. -001L`- PORMING APPARATUS. APPLICATION-FILED DEG. 21, 1910.

.Patent-ea sept. `10,191.2.t

4 SHEETS-SHEET 2.

M. SANDPIELD. f, COIL FORMIN G. APPARATUS.

APPLICATION 11LE11'111B0-21, 1910.

Patented sept. 10g-191.2.

- 4 SHEETS-*SHEET 4.

HIIIIIIIIIIIVIII a( wamEssEs:

Umriip sTATas Pi-ifrnivr onirica.

MICHAEL SANDFIELD, OF WILKINSBUBG, PENNSYLVANIA, ASSIGNOR TO WESTING- A HOUSE ELECTRICC MANUFACTURINQ CGMPANY, A CQRPORA'LIQN, OF PENNSYL- VANIA.

coiL-EORMING APEARATQUS.

Specification of Letters Patent.

Application, led December 21. 1910. Sei-iai No. 598,520.

new and usefillinproi-'eiiient in Coil-Forin- `ing Apparatus, o which the following is a specification.

` My invention relates *o machines for forming coils to used in dynamo-electric machines and it has for its objccJ to provide I al Simple, durable and effective mechanism whereby a wire 4coil blank of' an elongated formand having all of its turns in the same plane may be bent-'intosuitable form4 for application to the slots of' a cylindrically curved core by a Single movement of the operating parts, and whereby the operation may be repeated upon any number of successive duplicate coil blanks with the certainty .of producing AFinished coils 'of eiiaetly the same lform 'and dimensions.

The'machine which embodies my -inven,

tion is so constructed that. its cooperating partsmay be adjusted to adapt it for bending coils of a great variety of different sizes, and,l tosome extent, coils of different form, though it is specially adapted tor the formation of coils of the so-ealled dia.-

a bolt 21 with which the blo'clt is provided,

mond type.

in the accompanying'dra-wings, Figure 1 is a view in front elevation, of the appa-j ratus embodying my invention and show-j Fig. 2 is av v`ide elevation of the apparatus shown in ing a coil blank in position.

lg. 1; and Figs. 3 and et are, respectively,

a plan and a front elevation of one of the.

members of the supporting frame. F ig. 5 is a side elevation of a portion of the mechanisni shown in Figs. 1, 2, 3 and 4, 'the movable inc iuberof the apparatus being shown in open position and the coil in its final forni. Fig. 6 is a plan view of a completed coil. views of various parts Dif the operating n'iechanism.

The frame. 1 upon which the operating mechanism of the apparatus is mounted is preferably d isposedin'a vertical, or substantially vertical, plane, and comprises standards 2 and a vertical channel plate 3 provided with a slot t and with a graduated scale 5 upon its front face. A casting 6, which is provided with projections 7, is bolted to the low'er end yof the channel pla-te Figs. 7 to 18, inclusive, are detail 3, and a. horizontal shaft 8, having a. longitudinal groove 9 in its upper side, extends through and is rigidly secured to the' projections. A llever 10, having a longitudinal slot 11 in its upper portion anda transverse slot 1 2 at its eiitrerne upper end, to provide 'a handle, has two curved portions 13 and 14 below the longitudinal slotll, and its lower end is provided with a weight'l. Between the two curved portions 13 and 14, the lever is provided with a bearing to receivethe shaft 8, so that a rotative movement of the lever relative to the shaft is permitted.

lEach end of the shaft 8 is provided with an adjustble block 16 loosely mounted ona sleeve or bushing 161 having'a spline 17 (see Fig. 12), which fits into the" groove 9 in the shaft 8. The sleeve is readily movable longitudinallyof the shaft except when the spline is pressed into the groove by means of a curved rod 18,v the horizontal portion of which serves as a. .handle and the vertical portion of which may be screwed into the sleeve, so that its inner end will bear against the'spline. The block 16 is free to rotate about the sleeve 16", but its position is `sleeve.

otherwise determined. by the Mounted upon the block 16, is a U-shaped frame 19 having vertical slots 20 to receive' the frame' being vertically adjustable to the lilniit ot the length of the slotsl and being clamped in any position to which it. inaV be adjusted, by means of the bolt'Ql and itis nut. The shaft 8 is provided with a graduated scale 22 in order that the degree of' longitudinal adjustment ot' the blocks may be accurately' determined. The lower ends' of two rods 23 and 24 are pivotallyattached to each .frame 19, such lower ends being of U-shape (see Figs. 2 and 5) and of such dimensions as to receive the -uppei end of the frame 19 between thearnis of the -U- shaped portions.

The arrangement of the rods 223 and Qf-t is such that. the clamping block 50 is maintained horizontal, thereby avoiding friction between the parts 5.0 and 51 and the co il ends duringithe forming process. This is particularly important since the insulation on the coil would otherwise be injured. The casting 6 is provided with, sector 25 having a graduated sc'ale 26 and teeth 26 corresponding to the scale graduations.

gum-m.

of the coil to be. zbent, the other member 33 27 having a clamping screw 28, so that it may be adjusted to any desired position on the sector and securely locked in that position with its upper face coinciding with any one of the sca-le graduations. 'The curved portion 13 of the lever 10 isprovided with a portion 29 which embraces the sector 25,

and is adapted to engage the stopblock 27 and thus limit its degree of movement ,to such extent as may be desired.

A casting 30 is mounted upon the channel plate 3 andis .so clamped in position thereon, by means of a bolt 31 and the slot 4, as to be adjustableyertically in accordance with the diameter of the core member for which the coil to be bent is intended, the degree of adjustment being determined by means .of'the graduated scale 5. The casting 30 constitutes one member of a clamp and is provided with a seat 32 for one side -of the clamp being hinged to the lower edge of the casting and having a seat 34 which`is the counterpart of the seat 32 in the casting. The hinged member 33 of'the clamp is connected to an eccentric 35,'by means of a link 36, andthe eccentric is turned, to open and close the clamp, by means of a rod or lever 37.

A casting 38, which is similar to the castingt 30, is-mounted upon the lever 10 and is clamped thereto by means of a bolt 39 which .projects through the longitudinal slot 11 and therefore constitutes means whereby the casting may be adjusted along ^thellever in accordance with such adjustment as may be provided for the casting 30 on the channel plate 3. The casting 38 is provided with a seat 40 for one side of the coil to be bent and a clamp member 4l is hinged to the upper edge of the casting, its lower edge being provided with a seat 42 which is the counterpart pi that in the casting. The hinged clamp member is connted to. an eccentric 43 by means of a link 44 and the eccentric is rotated to open and close the. clamp by means of a -rod or lever 45, this clamp structure being substantially'like that which is mounted on the channel plate and is illustrated in detail in Figs. 14 to 18, inclusive.

Each pair of rods 23 and 24 is provided with a clamp 46 for one cndof the coil blank, this clamp comprising a block 47 having slots 48 and bearing pieces 49 there- -in for the rods 23 and 24 which are so disposed as topermit freedom of relative movement between the rods and the block.

' Clamped-to the inner end of the block are two plates 450 having frontedges-of such form as to receive the coil ends and, in a measure, ,to determine the'form which such y .ends shall take when the bending is completed.l A rod 51 of approximately L-shape has its longer arm projecting through a hole in the plates 50 and the end of the block 47 The two sets ofv rods and the coperating4 clamps are similar and, consequently, a description of one will ,suffice for both.

In using the Vapparatus to bend a coil into final form, the sides of the coil blank, having the form indicated in Fig. 1, are

clamped in the seats 32 and 34, and 40 and 42, by means of the eccentrics 35 and 43 and the levers 37 and 45. The 'end clamps 46 are then brought into position; with the ends of the coil blank projecting into the spaces between the plates 50, and the L-sha'ped rods 51 are inserted. The handle of the lever 10 is then' grasped by the operator and is drawn away from the frame until its part 29 engages the stop 27 which rhas been set in accordance wit-h the width of the coil desired, the-parts being then in the position indicated in Fig. 5. The L-'shaped rods 51 may now be removed and the coil be released from the clamps, when it may be the original position for the insertion of another coil blank. The operation may be repeated any desired number of times with the certainty' that the. resulting coils will be alike in form and dimensions, provided the original blanks are alike.

The adjustment features provided and hereinbefore described, are obviously such -as to permit adaptation of the apparatus to coils of various sizes which are intended forv use with either stationary or rotatable core members of various diameters, the block 16 being adjusted upon the shaft 8 to such positions that when the lever 10 is in its outermost position and the coil is bent to its final form, the rods 23 and 24 will substantially be at right angles to the shaft 8. The end clamps 46 are adjusted upon the rods 23 and24 to such positions that the coil ends 'will be offset, relative to the imaginary surface generated by the sides of the coil as thev are separated, in the -forming process.

Then the coils are intended for insert-ion in slots in the concave face of the stator core of an induction motor or in the slots of any similar stationary core member, clamps 46 will be so adjusted on the rods 23 and 24 that the coil ends will be forced outwardly from the center of the shaft 8. But, if the coils are intended for insertion in the slots formed in the convex cylindrical surface of a core member, such as a rotor, the clamps will be so adjusted that the coil ends will bepulled inwardly toward the center of the shaft- 8. By this means, vthe ends of the coil are properly offset in every case to clear the readily removed and the parts returned to While the apparatus here shown and de scribed-has beenlfoundto'be well adapted for the'servi'ce intended, it will be under- '10 stood tliatiA variations of structural details Without departing from the spirit and scope of my invention. 4

I claim as,my invention:

`1. A coil formercomprising relatively movable hinge-connected members, side clampsfsecured to the respectivemembers and adjustable thereon toward and away from each other, and end clamps independ- -ently adjustable. relative to the hinge-con- 2. A. coil former comprising a vertical' plate or. frame, a lever pivotally connected thereto, side clamps respectively supported on the plate or frame and on the lever and4 adjusta le thereon toward and away from each other, end. clamps and supporting means therefor, whereby said end clamps are adjustable only in parallelism with the axis of the lever.

3. A "coil former .comprising a vertical plate or frame, a casting or bracket secured thereto, a shaft supported by the casting or bracket, a lever rotatably mounted ou the shaft, side clamping members secured to theplate or frame and to the 4lever and adj ustable thereon toward and away from each other, and opposing end clamps supported on the respective ends of the shaft and adjustable only in parallelism relative thereto.

LA coil .former comprising a vertical plate or frame, a casting or bracket secured thereto, a shaft supported by the casting or bracket, a lever rotatably mounted on the shaft, side clamping members secured to the plate or frame and to the lever Aand adjustable thereon toward and away from each other, opposing end clamps, supporting blocks therefor adjustably mounted on the respective ends of the shaft, and connecting links between the end clamps and the supports.

`5. A coil former comprising a vertical plate or frame, a casting or bracket secured thereto, a shaft supported by the castingr or bracket, a lever rotatably mounted on the shaft, side clamping members adjustably secured to the plate or frame and to the lcver, opposing end clamps, supporting blocks therefor adjustably mounted on the respective ends of the shaft, and parallel-:notion connections between the -shaft and the end jclamps.

6. A coil former comprising a vertical plate or frame, a casting or bracket secured thereto, a shaft supported by the casting or bracket, a leverrotatably mounted on the' shaft, side clamping members ad j ustably sey curcdto the-plate or frame a-nd to the-lever,

opposing end clamps, sleeves disposed on the respective ends of the shaft and adjustable 'longitudinally thereof, supporting blocks rotatably mounted on the sleeve, and a pair of parallellinks between each supporting block and its end clamp. 1 and arrangements of parts may be made 7. A coil former comprising a vertical plate or frame, a casting or bracket secured thereto, a shaft supported' by the casting or bracket, a lever rotatably mounted on-tlic shaft, side` clamping members adjustably secured to the plate or frame and to the lever, opposing end clamps, pivoted supporting blocks .therefor disposed on `the respective. ends of the shaft and adjustable longitudinally thereof, and a pair of parallel links between each supporting block and its end clamp, whereby/"the end clamps are adjustable only in parallelism with thev shaft.

8. A. coil former comprising a vert-ical plate or frame, a castingor bracket secured thereto,' a shaft supported by the casting or bracket, a lever rotatably mounted on the shaft, side clamping members adjust-ably secured to the plate o r frame and to the lever, opposing end clamps, sleeves or bushings disposed on the respective ends of the. shaft and adjustable longitudinally thereof, supporting blocks pivotally mounted on the sleeves, a pairof parallel interposed connecting links between each support and its end clamp, and means for adjusting the end clamps to vary the`etl'ective length of the cri-meeting links.

i). .t coil former comprising relativelymovable hinge-connected members, adjustable means on one member for limiting the relative movement of the other, and side clamps secured to the respective members and adjustable thereon toward and'away from'each other.

l0. A coilformer comprising a vertical plate or frame, a lever pivotally connected thereto,l a graduated segment secured to the plate or frame, an adjustablestop thereon forl limiting the movement of the level', and side clamps respectively supported on th'e plate or frame and on the lever and adjustableA thereon toward and away from each other.

ll. A coil former comprising a vertical plate or frame, a lever pivotally'connecd thereto, a` graduated segment secured to the plate or frame, an 'adjustable stop thereon for limiting the movement of the lever, side clamps respectively supported on the plate or frame and on the lever, end clamps and supporting means therefor, whereby said end clamps are` adjustable onlyy in .parallelism with tgie axis of the pivoted lever.

12. A lcoil former, comprising relatively v In testimony jwhereof, have hereunto movable hinge-connncted members, side vsubscribed'nly name this mth day of Dec. 10

lamps :(espectivel 1supported on the mem# 1910.

ers an adjusta e thereo toward an'd l away from each other, end c1amps,j'and MICHAEL SANDFIELD' means for so supporting the end clamps as Witnesses:

to offset the coil ends as the hinge-connected R. J DEARBORN, members :tre separated. B. B. H1NEs.. 

